Staple pack

ABSTRACT

A box-type staple pack ( 1 ) formed in accordance with planer dimensions of a staple sheet is provided with an upper face window ( 3 ), a bottom face window ( 4 ), and a rear face window ( 5 ) and is provided with a staple outlet ( 6 ) in a slit-like shape at a front face thereof. When the staple pack is charged to a staple cartridge, a pressing plate in the staple cartridge is brought into elastic contact with a lower face of the staple sheet via the bottom face window ( 4 ) and a whole staple pack ( 1 ) is pressed to a ceiling face at inside of the staple cartridge. A feed claw disposed at an upper portion at inside of the staple cartridge is brought into contact with an upper face of a topmost staple sheet exposed to the upper face window ( 3 ) and feeds the staple sheet to a front side via the staple outlet ( 6 ). Charging is facilitated by dispensing with time and labor of unpacking a package or removing a bundling strap.

TECHNICAL FIELD

The present invention relates to a staple for refilling used for anelectric stapler, particularly relates to a staple pack facilitated tohandle by being made to be chargeable in the form of a package.

BACKGROUND ART

In a conventional electric stapler, it is general to use a throwawaytype staple cartridge in which a whole staple cartridge is replaced whenstaples inside are used up. However, a staple cartridge of a refillingtype refillable staple sheets has been spread, in order to achievesaving of resources and a reduction in wastes. A staple for refilling isdistributed in a condition that staple sheets adhered with linearstaples in parallel with each other are stacked and bound by a bundlingstrap of paper or a resin sheet, and accommodated in a paper box. Abundle of the staple sheets are taken out from the paper box and chargedinto a staple cartridge. The strap is removed and a cover of the staplecartridge is closed. Thereby, a mounting of the staple cartridge theelectric stapler is completed.

DISCLOSURE OF THE INVENTION

According to the refilling staple sheets of the background art, thebundling strap for bundling the staple sheets must be removed after themounting. However, when the strap is erroneously removed before themounting, the bundle of the staple sheets is disassembled and the staplesheets cannot be charged in one motion, or the staple sheets may bebroken by being dropped. Hence, there poses a technical problem to beresolved in order to facilitate to handle the replenishing staple sheetand it is an object of the invention to resolve the above-describedproblem.

The invention has been proposed to achieve the above-described objectand provides a staple pack used by being charged to a staple cartridgeof a staple refilling type for stacking staple sheets comprising linearstaples adhered in parallel with each other to contain in a box-typepack, the staple pack comprising: an upper face window reaching a frontend of an upper face of the box type pack from a middle portion of anupper face thereof in a front and rear direction and continuous to astaple outlet formed at an upper edge portion of a front face thereof, arear face window provided at a center of a rear face thereof in a leftand right direction to extend to two ends thereof in an up and downdirection, a bottom face window continuous to a lower end of the rearface window, wherein when the staple pack is charged to the staplecartridge, a staple feed claw is brought into contact with the staplesheet via the upper face window, a pressing plate at inside of thestaple cartridge is brought into contact with the staple sheet via thebottom face window.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1(A) and FIG. 1(B) show an embodiment of the invention, FIG. 1(A)is a perspective view of a staple pack containing a staple sheet, andFIG. 1(B) is a perspective view of the staple pack.

FIG. 2 is a perspective view of a staple cartridge and an electricstapler.

FIG. 3 is a perspective view showing the staple cartridge in a state ofopening a slide door.

FIG. 4 is a perspective view of a state of mounting the staple cartridgeto an electric stapler.

FIG. 5 is a perspective view of a state of charging the staple pack tothe staple cartridge.

Further, in notations in the drawings, numeral 1 designates a staplepack, numeral 2 designates a staple sheet, numeral 3 designates an upperface window, numeral 4 designates a bottom face window, numeral 5designates a rear face window, numeral 6 designates a staple outlet,numeral 13 designates a staple cartridge, numeral 14 designates anopening portion, numeral 15 designates a guide rail portion, numeral 16designates a slide door, numeral 17 designates a tension coil spring,numeral 18 designates a compression coil spring, and numeral 19designates a pressing plate.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

A detail description will be given of an embodiment of the invention inreference to the drawings as follows. FIGS. 1(A) and 1(B) show thestaple pack 1, FIG. 1(A) shows a state in delivery containing the staplesheet 2, and FIG. 1(B) shows an empty state using up the staple sheet 2.The staple pack 1 is a box made of paper formed in accordance withplanar dimensions of the staple sheet 2 and is formed with the upperface window, the bottom face window 4 and the rear face window 5. Therear face window 4 is constituted by an octagonal shape in accordancewith a shape of the pressing plate of the staple cartridge, mentionedlater, and continuous to the rear face window 5 having a long verticallength extended to two upper and lower ends of a center of a rear facein a left and right direction. The upper face window 3 reaches a frontend from a middle portion in a front and rear direction to cover anoperational range of a staple feed claw at inside of the staplecartridge. An upper end portion of a front face (depth side of paperface in the drawing) is formed with the outlet 6 in a slit-like shapeextended to a total width thereof and in FIG. 1(A), a topmost staplesheet is fed to a front side through the outlet 6.

Next, an explanation will be given of the staple cartridge using thestaple pack 1. In FIG. 2, numeral 11 designates a driver unit of anelectric stapler which is arranged at inside of a copier (notillustrated) in an attitude reversing a normal attitude in an up anddown direction in view of a relationship with a print face of the copierfor injecting staples from the driver unit 11 to an upper clincher unit(not illustrated). The staple cartridge 13 attachable and detachable toand from a cartridge containing portion 12 of the driver unit 11 isformed with the opening portion 14 at a rear face thereof, and the slidedoor 16 is engaged with the guide rail portions 15 in a verticaldirection formed at rear ends of two left and right side faces. Theslide door 16 is pulled up to an upper side by the tension coil springs17 made to span upper portions of the two left and right side faces ofthe staple cartridge 13 and the slide door 16. Further, the pressingplate, mentioned later, is included at inside of the staple cartridge 13and the pressing plate is pushed up to the upper side by the compressioncoil spring 18 installed at an inner bottom face thereof. A groove (notillustrated) is formed at a lower end portion of a center of a frontface (face on a side of inside of the cartridge) of the slide door 16, arear end portion of the pressing plate is projected to a position of thegroove and when the slide door 16 is pushed down to the lower side asshown by FIG. 3, the rear end portion of the pressing plate 19 isengaged with the groove and also the pressing plate 19 is moved downsimultaneously as shown by the drawing.

FIG. 4 shows a state of mounting the staple cartridge 13 to the driverunit 11 of the electric stapler and in charging the staple pack 1 to thestaple cartridge 13, the slide door and the pressing plate 19 are pusheddown to the lower side as shown by the drawing, and the staple pack 1 isinserted into the staple cartridge 13 when the rear side of the staplecartridge 13 is open. After inserting the staple pack 1, when the slidedoor 16 is released from being pushed down, as shown by FIG. 5, theslide door 16 is moved up to an initial position by being pulled by thetension coil springs 17 and the rear face of the staple pack 1 iscovered. The pressing plate 19 is brought into elastic contact with thelower face of the staple sheet 2 via the bottom face window 4 of thestaple pack 1 and a whole staple pack 1 is pressed to a ceiling face atinside of the staple cartridge 13. A feed claw (not illustrated)disposed at an upper portion at inside of the staple cartridge 13 isbrought into contact with an upper face of the topmost staple sheet 2exposed at the upper face window 3 of the staple pack 1 and feeds thetopmost staple sheet to the front side by being driven to reciprocate inthe front and the rear direction by a staple feeding mechanism of theelectric stapler. The rear face window 5 is provided as an escapementgroove when the pressing plate 19 is moved up in accordance with areduction in a number of sheets of the staple sheets.

In the case of using up the staples, when the slide door 16 and thepressing plate 19 are pushed down and the empty staple pack 1 is drawnout and the new staple pack is charged thereto, the new staple pack canimmediately be used.

Further, the invention is not limited to the above-described embodimentbut can variously be modified within the technical range of theinvention and the invention naturally covers the modifications.

The application is based on Japanese Patent Application (Japanese PatentApplication No. 2001-350670) filed on Nov. 15, 2001 and a contentthereof is incorporated here by reference.

INDUSTRIAL APPLICABILITY

As has been explained above, the staple pack of the invention is formedwith the windows by which the feed claw and the pressing plate of thestaple cartridge can be brought into contact with the staple sheet andthe outlet of the staple sheet and can be charged to the staplecartridge as it is and therefore, different from the replenishing staplesheet of the background art, it is not necessary to unpack the packageor remove the bundling strap and therefore, charging is simple andhandling performance is improved.

1. A staple pack, for being charged to a staple cartridge of a staplerefilling type, stacking staple sheets comprising linear staples adheredin parallel with each other, and containing the staple sheets in abox-type pack, comprising: an upper face window formed on an upper faceof the box type pack from a middle portion in a front and rear directionto a front end of the upper face, and continuous to a staple outletformed at an upper edge portion of a front face of the box type pack; arear face window formed on a center of a rear face of the box type packin a left and right direction, to extend to upper and lower ends of thebox type pack, and a bottom face window continuous to a lower end of therear face window, wherein when the staple pack is charged to the staplecartridge, a staple feed claw is brought into contact with the staplesheet via the upper face window; and wherein a pressing plate at insideof the staple cartridge is brought into contact with the staple sheetvia the bottom face window.
 2. The staple pack according to claim 1,wherein the staple pack is formed in accordance with planer dimensionsof the staple sheet.
 3. The staple pack according to claim 1, whereinthe staple pack is made of paper.
 4. The staple pack according to claim1, wherein the bottom face window is matched to a shape of the pressingplate of the staple cartridge.
 5. The staple pack according to claim 1,wherein the staple outlet comprises a slit extended to a total width ofthe staple pack.
 6. The staple pack according to claim 1, wherein therear face window is provided as an escapement groove in moving thepressing plate.
 7. The staple pack according to claim 1, wherein thestaple sheets are held in the staple pack without a bundling strap.